URS6 Way Too weak!!!

[HMS-S6]

That's exactly my point. That's why I said to measure fuel pressure under load.

Tested the fuel pressure under load today with two different gauges at full throttle in 3rd 4th and 5th and it was 4bar plus boost pressure on every run! Car is so so flat now out of boost range (pulling off at 1500rmp for eg) it barely pulls its own weight and feels forced under boost.

Is there anyone near-ish to me who knows their stuff willing to help??

Am i right in thinking the best next step is to obtain a WB02 sensor kit to make sure weak running is the issue??

[prj]

Does the car roll freely?

[K7ERG]

Overfuelling maybe?

[HMS-S6]

Does the car roll freely?

Yes mate, i push it in and out of the space in the garage i keep my cars in on my own and it rolls fine.
Its hard to describe without driving it. If it were an old car with a dizzy i'd say it was way too retarded but according to vag-com its far from the case. Just feels dead lazy, even free-reving it feels ****!!

[HMS-S6]

Overfuelling maybe?

Very possible mate!! What kinds of things would typically cause this??

[prj]

Overfuelling maybe?

You could have also said "hmm, maybe there's something wrong with it?"

On topic:
Have you tried removing the exhaust?
Leave only the DP.

Try unplugging the O2 sensor (both heater and signal), then unplug the ECU fully for a moment and plug it back in.

[prj]

Also, please take a pic of your engine bay, and post it up...

[HMS-S6]

You could have also said "hmm, maybe there's something wrong with it?"

On topic:
Have you tried removing the exhaust?
Leave only the DP.

Try unplugging the O2 sensor (both heater and signal), then unplug the ECU fully for a moment and plug it back in.

I've not tried removing it, but the system (downpipe back) is again off onother car which was running perfect Is it still worth trying??

I'll definitely try unplugging the 02 sensor though and the ecu as you mentioned!

I'll take a snap of the engine bay and post it up as soon as i can.

[prj]

Well, taking the system off can wait I guess - post up the engine bay first

Also, leave the O2 sensor unplugged, don't plug that back in.
If that doesn't give any difference - plug everything back in, then drive around a bit, and after driving around, log Group 000 with vag-com or make a screenshot of the 10 values.

[UrS4boy]

Prj is thinking that the catalytic converters are plugged. Despite what you say about the used system that you installed was from an UrS that was "running perfect", maybe it wasn't and/or now the cats are plugged enough that they are creating a huge back pressure, causing the car to feel very sluggish because the turbo can't spin up properly. You owe it to yourself to remove the exhaust from the cat's back (on a lift, in one piece (or whatever)) so you can feel how the car responds without any exhaust restrictions. (It will be a bit loud during the test).

[HMS-S6]

You could have also said "hmm, maybe there's something wrong with it?"

On topic:
Have you tried removing the exhaust?
Leave only the DP.

Try unplugging the O2 sensor (both heater and signal), then unplug the ECU fully for a moment and plug it back in.

I've not tried removing it, but the system (downpipe back) is again off onother car which was running perfect Is it still worth trying??

I'll definitely try unplugging the 02 sensor though and the ecu as you mentioned!

I'll take a snap of the engine bay and post it up as soon as i can.

[HMS-S6]

Well, taking the system off can wait I guess - post up the engine bay first

Also, leave the O2 sensor unplugged, don't plug that back in.
If that doesn't give any difference - plug everything back in, then drive around a bit, and after driving around, log Group 000 with vag-com or make a screenshot of the 10 values.

Thank-you, will get on the 02 part tomorrow as i have to drive customers cars hme tonight

Does the ecu use the 02 signal under full throttle??

[HMS-S6]

Prj is thinking that the catalytic converters are plugged. Despite what you say about the used system that you installed was from an UrS that was "running perfect", maybe it wasn't and/or now the cats are plugged enough that they are creating a huge back pressure, causing the car to feel very sluggish because the turbo can't spin up properly. You owe it to yourself to remove the exhaust from the cat's back (on a lift, in one piece (or whatever)) so you can feel how the car responds without any exhaust restrictions. (It will be a bit loud during the test).

It had its standard system on, on which it ran awful, i then fitted another system, inc cats, which it still ran awful on, then fitted cat bypas pipes, then this system i have now. The car has ran the same through all of this!!!

[prj]

Thank-you, will get on the 02 part tomorrow as i have to drive customers cars hme tonight

Does the ecu use the 02 signal under full throttle??

Yes and no
If it's way off, it can affect it.

Before you remove the ECU, you could actually try logging Group 000, so that you get the current trims...
Probably better idea to do it that way around...

So:
1. Log Group 000 trims.
2. Remove ECU, disconnect O2 sensor (heater & signal)
3. Reconnect ECU

Try...

4. Remove exhaust.

Plus the engine bay pic part still applies, I really want to see it

[HMS-S6]

Yes and no
If it's way off, it can affect it.

Before you remove the ECU, you could actually try logging Group 000, so that you get the current trims...
Probably better idea to do it that way around...

So:
1. Log Group 000 trims.
2. Remove ECU, disconnect O2 sensor (heater & signal)
3. Reconnect ECU

Try...

4. Remove exhaust.

Plus the engine bay pic part still applies, I really want to see it

Thank's will do asap